Coaster holder



FIG. 1 is a perspective view of a coaster holder showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a coaster holder, as shown and described. 